Earnings Per Share (Computation Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc.	$ (13,228)	$ (11,111)
Weighted average number of shares outstanding-basic	22,348,994	22,114,927
Weighted average number of common stock – diluted	22,348,994	22,114,927
Basic earnings (loss) per share	$ (0.59)	$ (0.50)
Diluted earnings (loss) per share	$ (0.59)	$ (0.50)
Awards excluded from diluted earnings (loss) per share	207,657	783,063